diff --git a/php/nginx/letsencrypt.runit b/php/nginx/letsencrypt.runit
index 9a3cc22..660a32d 100755
--- a/php/nginx/letsencrypt.runit
+++ b/php/nginx/letsencrypt.runit
@@ -15,10 +15,10 @@ fi
 
 if [ "${LETSENCRYPT_MODE,,}" = "production" ]; then
     echo -e "LetsEncrypt is running against the \e[32mPRODUCTION\e[0m servers."
-    LETSENCRYPT_MODE=
+    LETSENCRYPT_MODE=""
 else
     echo -e "LetsEncrypt is running against the \e[31mSTAGING\e[0m servers."
-    LETSENCRYPT_MODE=--test-cert
+    LETSENCRYPT_MODE="--test-cert"
 fi
 echo -e "To change this, change the value of LETSENCRYPT_MODE"
 
@@ -31,7 +31,7 @@ echo -e "Certbot is running for \e[33m${LETSENCRYPT_EMAIL}\e[0m / \e[33m${LETSEN
   certbot \
     certonly \
       --nginx \
-      $LETSENCRYPT_TEST_MODE \
+      $LETSENCRYPT_MODE \
       -d $LETSENCRYPT_DOMAINS \
       -n \
       -m $LETSENCRYPT_EMAIL \